I love DOS, I know we live in a world of graphic card wielding PC's but sometime DOS just feels right. A few days ago I needed to search several 100 log files for a specific entry and was reminded by a fellow colleague about the FindStr dos command that can search through multiple files using regular expressions.
You can find a list of metacharacters that findstr accepts and also a list of parameters in the XP Professional product documentation.
"Excellence is to do a common thing in an uncommon way." - Booker T. Washington